Casement window lock



June 22,1948. M. J. @APP 2,443,850

CASEMENT WINDOW LQCK Filed ned. 2S, 194e ma: BMM

ATTO RN EY Patented June 22, 1948 2,443,850 i CASEMENT WINDOW Loon` Michael J. Clapp', Brooklyn,` N., Y., assignnr `of one-thirdto Alexander R. La Guardiaandonethird to Pauli M'. La Guardia, both of Brooklyn,

Application December 2s, 194e, sei-mno. 719,079.

ZClaims. 1

Thisinvention relates: to locks for easement windowsor the like.

It is the vprimary aim and object of the present invention to provide a lock which is particularly suited'for windows of the type generally known as French windows; and which is so inconspicuous as to its function as a lock that it neither appears tothe casualobserver as a prominent part of the window, nor is it readily discernible by a burglar.

It is another important object of the present invention to provide a lock of the above characteristics which is of simple and rugged construction, and which may easily be shaped to fit harmoniously into the general design of a window.

The above and other objects, features and advantages of this invention will be fully understood from the following description, reference being had to the accompanying illustrative draw# ings.

In the drawings:

Fig. 1 perspectively shows the `present invention embodied in the latch members of a pair of easement windows;

Fig. 2 is a side elevation of the latch members as viewed in the direction of the arrow 2 in Fig. 1;

Fig. 3 is a longitudinal section through the lock employed in the invention; and

Fig. 4 is a section taken on line 4 4 of Fig. 3.

Referring to the drawings, and particularly to Fig. l thereof, the reference numerals I and I2 designate easement windows which, in the present instance, are of the type known as French windows. Each of these windows comprises a sash I 4 and suitably arranged glass panels I6. Windows of this type are customarily hinged on a framework so as to open either outwardly or inwardly. In the present instance, the windows I0 and I2 are arranged so as to open outwardly. Further, windows of this type are usually arranged in pairs, the opposite sides of which are hingedly mounted on the framework, while the adjacent sides thereof carry on the inside conventional latching means I8 by means of which these windows are held closed against an intermediate jamb 2i) of the framework. The latching means I8 are identical for each window, each comprising a latch handle 22 which is pivotally mounted at 24 on a bracket 2B, riveted or otherwise secured at 28 to a mounting portion 3i) of a window. Each latch handle 22 is also provided with a latch finger 132 which cooperates with a keeper 34, having the cusitY closed, by turning the latch handle 22 into the` latching position shown in Fig. 1.

In accordance with the present invention, there' is provided a lock 40 which is divided into` two complementary sections 42 and 44Kthat are carried by the latch handles 22, respectively. `More particularly, the lock sections y42 'and 44 comprise casings -46 and48, respectively, which -may suit# ably besecured. to; or made integralwith,theA

latch handles 22,` respectively. The casing '46 is preferably'provided with an inwardly offset, open end Siiwhich iits into the adjacent open end of the closed position shown'in Figs. 3 and 4. Permanentlymounted in `any suitable mannerbetween spacers 52 in the casingd is a catch 54 whichis adapted to interlock with a bolt `56 in managing 4a `in order to lock` the 'sections 42; 4t in their 'closed position. The bolt Ei'is pivotally mounted at 58 in the casing 48, and is normally urged into interlocking relation with the catch 54 by means of a leaf spring 60 which is held in place in a spring seat 6|, suitably mounted in the casing y48. The bolt '5S may be rocked out of interlocking relation with the catch 54 by a cam lug 62 on the revolving plug G4 of an auxiliary lock 66 which is, in the present instance,

f' in the form of a Yale type cylinder lock. This lock comprises also a cylinder 68 (Figs. 3 and 4) which is suitably secured at lil in the casing 48 and rotatably supports the revolving plug 64, the latter being held against axial removal therefrom by a screw 12, threadedly received in the cylinder 68 and projecting into an annular groove I4 in the plug 64. The cylinder 6B is peripherally slotted as at l5 to admit the bolt 56 into cooperative relation with the cam lug 62 on the plug 64. The revolving plug 6'4 is provided with a longitudinal groove 'I8 for the insertion of a key (not shown) with which to operate the customary spring-urged tumblers 82 in the auxiliary lock 66 to release the plug 64 from its locked relation with the cylinder 68 (see full-line position of plug G4 in Fig. 3) and permit it to turn. On inserting the key, the same may be turned so as to turn the revolving plug 6i into the dot-and-dash line position shown in Fig. 3, whereby the cam lug 62 forces the bolt Each window may be opened 56 into the dot-and-dash line position shown in the same figure, i. e., out of interlocking relation with the catch 54. The latch handles 22 may then be turned on their pivots 24 in the direction of the arrows 90 and 92, respectively, in Fig. 1 into position to release the windows l0, l2 for outward opening. Also, either window I or I2 alone may be opened when the lock 40 is opened in the previously described manner. Thus, Window I2 may, for instance, be opened after opening the' lock 40, by rocking latch handle 22' in the direction of the arrow 92 in Fig. 1 toward and beyond the dot-and-dash line position there shown, until the latch finger 32 on the handle 22' clears the keeper 34', whereupon the window I2 may be swung outwardly. The auxiliary lock 66 may also be provided with a spring (not shown) which normally returns the revolving plug 64 into the full-line position shown in Fig. 3, so that lock 40 will close automatically when both latch handles 22 on the closed Vwindows l0, l2 are turned into their respective latching positions as shown in full-lines in Fig. 1.

It appears from Fig. 1 that the latch handles 22 are, in the present instance, constructed for left and right hand operation, respectively, so that these handles approach each other when turned in opposite directions into their respective latching positions, thereby rendering them particularly suitable for the embodiment of the lock 40 to the end that the latter is closed when the latch handles 22 are turned into their respective latching positions. Also, mounting the lock sections 42, 44 on the ends of the latch handles 22 tends to render the lock 40 inconspicuous as to its function as such, and affords the opportunity to form the lock sections 42, 44 so that they t harmoniously into the general design of the latch handles 22. The lock sections 42, 44 may even be formed to appear to an observer as ornamental parts of the latch handles 22.

While the present locking device has, by way of example, been described herein in conjunction with easement windows, it is to be understood that the same may be used with equal advantage on hinged ldoors or other similar closures.

4 Having thus described my invention, what I claim and desire to secure by Letters Patent is: l. A locking device for a pair of hinged closure members closable against an intermediate .lamb 5 comprising, elements pivoted on said members, respectively, on the adjacent sides thereof and turnable in opposite directions for releasably latching the closed members to said jamb, said elements having handle portions1 respectively, approaching each other on turning said elements into their respective latching positions, and a lock comprising complementary sections carried bysaidhandle portions, respectively, said sections comprising ycasings, respectively, holding parts, respectively, which interlock with each other on turning said elements into their respective latching positions, and key-operated means carried inone of said casings for releasing said parts `from interlocked relation with each other. 2. A locking device for a pair of pivotally mountable left and right hand latch members of the type adapted to swinging closure members, respectively, comprising a lock having comple mentary sections carried by said latch members, respectively, and comprising parts, respectively, which are relatively movable to and from interlocking relation with each other when said members are disposed in their mounted relation to each other and assume their respective latching positions, and means for relatively moving said parts to and from interlocking relation with each other.

MICHAEL J. CLAPP.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number 

